Circuit for detecting optical failures in a passive optical network
US7646990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2006 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Jan 24, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0079
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit for detecting optical failures in a passive optical network (PON) wherein digital burst data transmitted by an optical transmitter is monitored by a photodiode, includes a power determination unit coupled to the photodiode for providing measurements of an output optical power of a high logic level and a low logic level of the digital burst data during ON times of the optical transmitter and for providing a measurement of an output optical power during OFF times of the optical transmitter. A logic unit coupled to the power determination unit is responsive to the measurements for generating control and calibration signals. Such a circuit may be used for detecting rogue optical network unit (ONU) failure or eye safety hazards in a passive optical network (PON) wherein digital burst data transmitted by an optical transmitter is monitored by a photodiode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.